The HotHits Rupert Sanders directs the upcoming action/drama starring Charlize Theron, and had nothing but positive words to say about Kristen.
He revealed "When I met her I was very taken by this rebellious streak to her... she's a very tough girl. If the role demands it she'll throw herself off a cliff."

We also asked the lovely Kristen Stewart to tell us how it was to work with Charlize Theron!
"Awesome..." Kristen said. "She's a real game upper. I want to stand on my tip toes around her, I want to impress her..."
"You're always taking a bit of a gamble signing onto a movie... (but I knew) I want to work with her... it could be a terrible movie, (but) I want to work with her."